How to carry out replacement: Thermostat 1.9 TDI VW Jetta 1k2
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Change VW Jetta 1k2 2.0 TFSI Thermostat yourself – manuals and video tutorials

How to change engine thermostat on VW Jetta Mk5 (1K) – replacement guide

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When to replace the Thermostat on your VW JETTA
Recommended replacement interval for the part category Engine thermostat : 50000 km
Important!
This replacement procedure can be used for:
VW Jetta Mk5 (1K) 1.9 TDI … View more

The steps may slightly vary depending on the car design.

This video shows the replacement procedure of a similar car part on another vehicle

All the parts you need to replace – Thermostat for Jetta Mk5 (1K) and other VW models
How to change Engine thermostat on VW Jetta 1k2 1.9 TDI – step-by-step instructions for straightforward car repair Engine thermostat
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Engine thermostat for Jetta Mk5 (1K) Diesel (105 hp)
Tools
Replacement: engine thermostat – VW JETTA III (1K2). Tools you might need:
Torque wrench
Drive socket # 7
Drive socket # 10
Drive socket # 13
Ratchet wrench
Fluid container
Funnel
Fender cover
Buy tools
Replacement: engine thermostat – VW JETTA III (1K2). Tip from AUTODOC:
  • Check the condition of the coolant every time you replace the thermostat. Change the coolant if necessary.
  • Please note: all work on the car – VW JETTA III (1K2) – should be done with the engine switched off.
Carry out replacement in the following order:
  1. Step 1
    Open the hood.
    Step 2
    Use a fender protection cover to prevent damaging paintwork and plastic parts of the car.
    Step 3
    How to change Thermostat on VW Jetta 1k2 2005 - free PDF and video manuals
    Unscrew the coolant reservoir cap.
  2. Step 4
    How to replace VW Jetta Mk5 (1K) 1.9 TDI 2006 Thermostat - step-by-step manuals and video guides
    Prepare a container for fluids.
  3. Step 5
    VW Jetta 1k2 1.6 2007 Thermostat replacement: free workshop manuals
    Loosen the coolant hose clamp. Use a drive socket #7. Use a ratchet wrench.
  4. Step 6
    Changing Thermostat on VW Jetta Mk5 (1K) 1.6 FSI 2008 by yourself
    Detach the coolant hose.
  5. Step 7
    How to remove VW JETTA 2.0 TDI 2009 Thermostat - online easy-to-follow instructions
    Drain the coolant from the engine.
    Replacement: engine thermostat – VW JETTA III (1K2). Tip:
    Caution! The coolant can be very hot.Wear gloves to prevent contact with hot liquid.All work should be done with the engine stopped.Wait until the coolant has completely flowed out of the drain hole.
  6. Step 8
    How to replace Thermostat on VW Jetta Mk5 (1K) 2010: download PDF manuals and video instructions
    Unscrew the thermostat housing fasteners. Use a drive socket #13. Use a ratchet wrench.
  7. Step 9
    How hard is it to do yourself: Thermostat replacement on VW Jetta 1k2 1.6 TDI 2005 - download illustrated guide
    Remove the thermostat housing.
    AUTODOC recommends:
    Replacement: engine thermostat – VW JETTA III (1K2). Do not use excessive force when removing the part as this may damage it.
  8. Step 10
    Need to know how to renew Thermostat on VW JETTA 2006? This free workshop manual will help you to do it yourself
    Remove the thermostat.
    AUTODOC recommends:
    Replacement: engine thermostat – VW JETTA III (1K2). Do not use excessive force when removing the part as this may damage it.Caution! Coolant may leak out of the coolant lines and thermostat housing.
  9. Step 11
    Changing of Thermostat on VW Jetta 1k2 2007 won't be an issue if you follow this illustrated step-by-step guide
    Install a new thermostat.
    Replacement: engine thermostat – VW JETTA III (1K2). Tip:
    When installing, do not use excessive force to avoid damage to the part.
  10. Step 12
    VW JETTA 2.0 TFSI Thermostat replacement: online guides and video tutorials
    Install the thermostat housing.
  11. Step 13
    Replacing Thermostat on VW Jetta 1k2 2009 1.9 TDI by yourself
    Tighten the thermostat housing fasteners. Use a drive socket #10. Use a torque wrench. Tighten it to 13 nm torque.
  12. Step 14
    Jetta Mk5 (1K) 2.0 TDI 2010 Thermostat DIY replacement workshop manual
    Attach the coolant hose.
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